1. National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
2. State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China
3. State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China
4. Institute of Functional Crystals, Tianjin University of Technology, Tianjin 300384, China
5. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
6. Department of Mechanical Engineering, Northwestern University, Evanston, Illinois 60208, United States